High-frequency line-to-waveguide transducer

• Main Authors: KAZUYA SAYANAGI, IKUO TAKAKUWA
• Format: Patent
• Language: English
• Published: 04.06.2003
• Edition: 7
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE; SEMICONDUCTOR DEVICES; WAVEGUIDES

On one surface of a dielectric substrate 1 having a thickness of one quarter of a signal wavelength, a ground electrode 3, and a strip line 2, one end thereof being connected to a high-frequency element 7 via a wire 8, are formed. On the opposite surface thereof, which opposes a waveguide 9, a ground electrode 4 is formed, a first electrode opening 5a having a predetermined length and width is formed, opposite to a proximity of an open end of the strip line 2, and a second electrode opening 5b is formed so that a center line b of a width thereof is separated outward by one quarter of the signal wavelength from a conductor wall a of the waveguide 9. Furthermore, via holes 6 having a length of one quarter of the signal wavelength, electrically connecting the ground electrodes on either surface, are formed. The waveguide 9 is disposed in proximity to the dielectric substrates 1 so that the center of the first electrode opening 5a coincides with the centre of the waveguide 9. In a further embodiment (fig. 4), a second substrate (1b) is formed on the second ground electrode (4a), and a third ground electrode (4b) is formed on the second substrate (1b). The electrode openings (5b, 5c) are formed on the third ground electrode 4b. In a final embodiment, the transducer is applied to a communication apparatus.